Hajar,
She is reaching for Neal's hand to see if he still has the crab since she missed it when it dropped through the water column. This species (or at least all that I have kept) are very far sighted and can't see well at all at close range (but can detect movement at at least 12' (3 meters). They primarily hunt by feel (as you can see in most videos of O.briareus) and by motion in the water or vibration on the rocks (very good at isolating vibrations).
Corpusse, Cassy will eat small amounts of food twice a day where her male sibbling only eats once.
She is reaching for Neal's hand to see if he still has the crab since she missed it when it dropped through the water column. This species (or at least all that I have kept) are very far sighted and can't see well at all at close range (but can detect movement at at least 12' (3 meters). They primarily hunt by feel (as you can see in most videos of O.briareus) and by motion in the water or vibration on the rocks (very good at isolating vibrations).
Corpusse, Cassy will eat small amounts of food twice a day where her male sibbling only eats once.